react-sigma/lib/DragNodes.js

Lightweight but powerful library for drawing network graphs built on top of SigmaJS

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _react = _interopRequireDefault(require("react"));

require("../sigma/sigma.plugins.dragNodes");

var _propTypes = _interopRequireDefault(require("prop-types"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

/**
 *
 * DragNodes component, exposing the dragNodes plugin.
 *
 * When this plugin is active, individual nodes can be dragged around on
 * the canvas. The plugin fires various events during dragging and dropping.
 *
 * This plugin is not compatible with the WebGL renderer.
 *
 * @param {Sigma$EventHandler} onStartdrag      provide callback for "startdrag" event, fired at the beginning of the drag.
 * @param {Sigma$EventHandler} onDrag      provide callback for "drag" event, fired while the node is dragged.
 * @param {Sigma$EventHandler} onDrop      provide callback for "drop" event, fired at the end of the drag if the node has been dragged.
 * @param {Sigma$EventHandler} onDragend      provide callback for "dragend" event, fired at the end of the drag.
 *
**/
class DragNodes extends _react.default.Component {
  constructor(props) {
    super(props);

    _defineProperty(this, "render", () => null);

    if (this.props.sigma) {
      const dragListener = sigma.plugins.dragNodes(this.props.sigma, this.props.sigma.renderers[0]);
      DragNodes.bindHandlers(props, dragListener);
    }
  }

  static bindHandlers(handlers, dragListener) {
    // Adapted from Sigma component
    ["startdrag", "drag", "drop", "dragend"].forEach(event => {
      let handler = "on" + event[0].toUpperCase() + event.substr(1);

      if (handlers[handler]) {
        dragListener.bind(event, handlers[handler]);
      }
    });
  }

}

_defineProperty(DragNodes, "propTypes", {
  sigma: function () {
    return (typeof sigma === "function" ? _propTypes.default.instanceOf(sigma) : _propTypes.default.any).apply(this, arguments);
  },
  onStartdrag: _propTypes.default.func,
  onDrag: _propTypes.default.func,
  onDrop: _propTypes.default.func,
  onDragend: _propTypes.default.func
});

var _default = DragNodes;
exports.default = _default;